Mercedes-Benz E-Class 2010 Owner's Manual page 63

Anti-theft systems
60
interference by other radar sources
R
the possibility of strong radar reflections,
R
for example in multi-storey car parks
®
PRE-SAFE Brake does not react to persons,
animals, oncoming vehicles, crossing traffic
or when cornering.
®
PRE-SAFE Brake may not detect narrow
vehicles such as motorcycles and vehicles
driving on a different line.
G
Risk of accident
Depending on the current speed, PRE-SAFE
Brake decelerates your vehicle by up to
2
4 m/s before performing possible emer-
gency braking. This is equivalent to approx-
imately 40 % of the maximum braking power
of the vehicle. You must additionally apply the
brakes yourself in order to prevent a collision
or minimise an impact. Automatic emergency
braking is not performed until immediately
prior to an accident in the event that you are
unable to avoid one by, for instance, taking
evasive action.
In order to maintain the appropriate distance
to the vehicle in front and thus prevent a col-
lision, you must apply the brakes yourself.
At speeds up to approximately 70 km/h,
®
PRE-SAFE Brake can also detect stationary
obstacles, for example stopped or parked
vehicles.
G
Risk of accident
If, in a critical driving situation, you do not
receive a visual and acoustic warning:
®
R PRE-SAFE Brake did not detect the risk of
a collision
®
R PRE-SAFE Brake is switched off
®
R PRE-SAFE Brake has failed
You must then brake to avoid a collision.
To activate: activate PRE-SAFE
X
the on-board computer (
The Ä symbol appears in the lower mul-
tifunction display, as long as the HOLD
function is not activated (
®
®
Brake in
page 203).
Y
page 172).
Y
On vehicles with parking guidance, the P
gear must be engaged for the icon to be
displayed.
The radar sensor system is switched off auto-
matically in the vicinity of radio telescope
facilities ( page 324).
Y
®
For PRE-SAFE Brake to assist you when driv-
ing, the radar sensor system must be
switched on and operational.
®
PRE-SAFE Brake does not always detect
complex traffic situations properly. You can
terminate the braking action of PRE-SAFE
Brake in a non-critical driving situation at any
time if:
an acoustic and visual warning occurs
R
the vehicle brakes
R
To end this, you can either depress the accel-
erator pedal further, activate kickdown or
release the brake pedal.
The braking action of PRE-SAFE
ended automatically if:
you manoeuvre to avoid the obstacle
R
you drive slower than approximately
R
15 km/h
there is no longer an obstacle detected in
R
front of your vehicle
there is no longer any danger of a collision
R
Following a collision or collision-related dam-
age to the front end of the vehicle, have the
configuration and operation of the radar sen-
sors checked. Choose a qualified specialist
workshop for this which has the necessary
specialist knowledge and tools for the work
required. Mercedes-Benz recommends that
you use a Mercedes-Benz Service Centre for
this purpose.
Anti-theft systems
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
®
®
Brake is